| 304奥氏体不锈钢粉末渗硅层的结构和性能 |
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| 引用本文： | 罗新民,王金兰,陈康敏,潘励.304奥氏体不锈钢粉末渗硅层的结构和性能[J].材料保护,2010,43(3). |
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| 作者姓名： | 罗新民 王金兰 陈康敏 潘励 |
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| 作者单位： | 江苏大学材料学院,江苏,镇江,212013;江苏大学材料学院,江苏,镇江,212013;江苏大学材料学院,江苏,镇江,212013;江苏大学材料学院,江苏,镇江,212013 |
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| 摘 要： | 为了提高高镍铬含量不锈钢的抗渗碳性,探索了奥氏体不锈钢表面的渗硅效果.通过扩散处理,在304奥氏体不锈钢表面获得了结构致密的渗硅层.应用SEM电镜和EDS能谱分析、显微硬度测定等方法观察了渗硅层的微观结构及其性能.结果表明,渗硅层厚度达50μm以上,为典型的柱状晶结构;渗层晶粒中由里到外的硅浓度分布区间为12.24%～20.93%;相应的微观组织的细密程度由表及里呈梯度分布,与基体结合处呈纳米晶结构;显微硬度由里到外在406～477 HV1N.缺口断裂法试验结果表明,渗硅层与钢基体结合十分良好.
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| 关 键 词： | 粉末渗硅 奥氏体不锈钢 梯度材料 微观组织 纳米表面 结合强度 |
Microstructure and Properties of Pack Cementation Siliconized Layer on AISI-304 Stainless Steel |
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| LUO Xin-min,WANG Jin-lan,CHEN Kang-min,PAN Li.Microstructure and Properties of Pack Cementation Siliconized Layer on AISI-304 Stainless Steel[J].Journal of Materials Protection,2010,43(3). |
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| Authors: | LUO Xin-min WANG Jin-lan CHEN Kang-min PAN Li |
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| Affiliation: | LUO Xin-min,WANG Jin-lan,CHEN Kang-min,PAN Li (School of Material Science , Engineering,Jiangsu University,Zhenjiang 212013,China). |
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| Abstract: | Fine and compact siliconized layer was prepared on the surface of AISI-304 stainless steel via pack cementation siliconiz-ing of mixed Si-Fe alloy powder with 70% Si (mass fraction) in the presence of SiO2 as a loosening agent. The microstructure of the siliconized layer was analyzed by means of scanning electron microscopy and X - ray energy dispersive spectrometry. Besides, the microhardness of the siliconized layer was measured, and its adhesion to substrate was evaluated by conducting notched break-ing ... |
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| Keywords: | pack cementation siliconized layer austanite stainless steel gradient materials microstructure nanocrystal surface adhesion strength |
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